Quadrant

Date: 03/25/2001 at 18:52:52
From: Kirsten
Subject: Quadrants 

What is a quadrant?

Date: 03/25/2001 at 22:53:21
From: Doctor Peterson
Subject: Re: Quadrants 

Hi, Kirsten.

"Quadrant" means "quarter," and in particular one of the four parts 
into which a plane is divided by the coordinate axes. They are 
numbered from 1 to 4, starting at the x axis and proceeding 
counterclockwise (since we measure angles in that direction):

        Y
        ^
      2 | 1
        |
    <---+---> X
        |
      3 | 4
        v

- Doctor Peterson, The Math Forum
  http://mathforum.org/dr.math/